Means for setting eyelets



F. L. HARMON.

,MEANS FOR SETTING EYELETS.

APPLICATION FILED JUNE 24, ms.

Patented May 31, 1921.

Inventor ANT FRANK 3L. HARMON, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO THE SDTGER MANUFACTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CURPORATION F NEW JEY.

MEANS FOR SETTING EYELETS.

arness.

Specification of Letters Patent.

Application filed. June 24, 1916. Serial No. 105,726.

To all 40 hom it my concern:

Be it known that I, FRANK L. HARMON, of Beverly, in the county of Essex and State of Massachusetts, have invented an Improvement in Means for Setting Eyelets, of which the following is a specification, reference being had to the accompanying drawings. This invention relates to a novel means for punching material and setting eyelets therein, being more particularly designed for use in a machine of the type disclosed in the Harmon application Serial No. 103,056, filed June 12, 1916, duplex eyelet machine. The machine as disclosed in the above mentioned application provides for two punches moving in opposite directions into cooperative relation with a combined set and anvil placed therebetween, the punches having telescopically arranged thereon eyelet set members cooperating with the stationary set.

The present invention, on the other hand, provides a stationary double-ended punch having cutting edges on each end thereof and a clenching surface thereabout for the eyelets, while cooperating therewith in place of the punches of the aforesaid application are solid-ended anvil members on which are arranged, telescopically, sets cooperating with the clenching surfaces of the punch.

This invention also provides for a strongly built punch having its cutting edges made on an obtuse bevel so that the material punched is condensed and thickened at the opening so that when the eyelet is set it will firmly grip the somewhat thickened edge portion of the material andstrongly resist edgewise stress upon theeyelet, which has a tendency to further enlarge the hole in the material'and to pull the eyelet therefrom along a portion of its circumference.

Means is also provided for stripping the work from the punch.

For a more complete understanding of this invention, reference may be had to the accompanying drawings in which,

Figure 1 represents a side elevation of the double-ended punch and its immediate mounting;

Fig. 2 is a plan View of the same parts showing in addition one of the feed members which are identical with those disclosed in the application above referred to;

Fig. 3 is a cross section of the punch detached from its mounting and to enlarged scale; and

Figs. 4 and 5 represent the solid end anvils together with the telescopic set members arranged in their relative operative position with respect to the punch and set of Fig. 3 As shown in Fig. 3, the punch has two clenchmg surfaces 1 for clenching the eyelets. Extending therefrom are the short stout cutting elements having abruptly tapered, outer surfaces 2' adapted to condense and thlcken the inside of the opening and also to round out the inside of the eyelets when the latter are forced over the surfaces and against clenching surfaces 1. A short bevel 2 is made from the inside of the punch outward to sharpen the same. The form of cutting edge tends to wedge the material at each side of the cutting edge away therefrom to thicken and condense the same. As shown, the cutting edges are 3o1ned by a passage therebetween having adjacent its central portion an opening through theside wall of the punch to allow for the escape of the punchings. The punch constructed in this manner must be made thick and strong to avoid bursting, due to the wedging action of the punchings which must be condensed to be forced within the passage. 3 represents the movable anvils cooperatmg with the cutting edges of the punch and which, as shown, are made solid of slightly larger area than the area within the cutting edges of the punch so that these cutting edges push thereagainst, so that members 3 are, in fact, anvil elements. The anvils 3 are mounted in the slides 3" by means of the lock nuts 9 in the same manner that the punches are mounted in the machine of the application above referred to.

Telescopically arranged on anvils 3 are the set. elements 6 having clenching surfaces 7 arranged to cooperate with the clenching surfaces 1 of the punch to clench the eyelet therebetween. These members are similar to corresponding set elements in the aforesaid application, and are mounted in identically the same manner in the slides 8 by means of lock nuts as 10. As shown in Fig. 1, the punch is provided on either side with spring fingers 4 which serve to lift or strip the material from the punch on retraction of the anvil members 3 therefrom. At 5 is also shown a work clamp arranged in the same manner as a similar part shown in the above mentioned application.

In the operation of the machine equipped with this invention, eyelets are taken from raceways, such as are shown in the above mentioned application, by anvils 3, the flat ends of the anvils serving to force the materials against the cutting edges of the punch to punch holes. The eyelets are forced down over the outer beveled surfaces of the unch ends, and when tne telescopic sets 6 are orced theretoward they are clenched in the material, action being similar to that of the machine shown in the above mentioned application, except for the position of the punches and sets, and the condenslngand thickening of the material at the openings. Having thus described one embodiment of this invention, though it is evident that many changes might be made therein without departing from the spirit or scope of the invention, what is claimedis,

1. A duplex punch having tapered ends presenting cutting edges and with clenching surfaces associated therewith, and solid and anvil members each having an operative anvil surface slightly larger than the area defined by the cutting edge of its complemental punch in cooperative relation with opposite ends of said punch.

2. A duplex punch comprising a hollow member having tapered punch ends with short inwardly disposed bevels formed to provide cutting edges, and solid end anvils cooperative with the opposite ends of said punch to simultaneously force two pleces of material onto said punch ends preparatory to setting eyelets therein.

3. A hollow duplex punch having oppositely directed apertured and sharpened punch ends adapted to cut holes in materials, and solid end anvils slightly larger in operative area than the area defined by the cutting edge of said punch ends, and cooperative with such punch ends.

4. A duplex punch having oppositely directed punch ends oppositely tapered to cut and condense-the cut edge portions of the body of material, and solid end eyelet supporting anvils cooperative simultaneously with said punch ends.

5. A hollow and relatively stationary punch having a tapered punch end and a short inward bevel forming a cutting edge, and a relatively movable eyelet supporting solid end anvil slightly larger in size than the area embraced by said cutting edge and cooperative with said punch end.

6. A hollow and relatively stationary punch having a tapered punch end equipped with a cutting edge and with a clenching surface therearound, and a solid end eyelet carrying anvil slightly larger in end area than the area defined by the said cutting edge and cooperative vwith said punch en 7. A relatively stationary punch with opposite hollow reduced punch ends each formed with a cutting edge for penetrating and cutting through the materials to be eyeleted, said punch set having a passage therethrough between said punch ends, and solid end anvils slightly larger than and cooperative with said punch ends.

8. A duplex punch having opposite hollow punch ends each formed with a cutting edge for penetrating and cutting through the materials to be eyeleted and with clenching surfaces therearound, said punch being formed with a passage therethrough between said punch ends, and solid end eyelet carrying anvils slightly larger than and cooperative with the respective punch ends.

9. A hollow duplex punch having oppositely directed punch ends formed with abruptly tapered outer surfaces and inwardly beveled surfaces to provide circular cut-- ting edges at opposite ends of said punch, said punch having clenching surfaces merging into said tapered outer surfaces, and relatively movable flat anvil members slightly larger in 'size than the circular edges of said unch and arranged to cooperate therewith.

10. In a fastener setting machine, a punch, an anvil therefor, and a setting device telescopically related to said anvil.

11. In a fastener setting machine, a punch provided with a fastener clenching surface, an anvil cooperating with said punch, and a clenching member mating said clenching surface and telescopically arranged with relation to said anvil.

12. In a fastener setting machine, a

punch having a cutting edge, an anvil mov- I able against and from said cutting edge to punch material placed therebetween, and a fastener clenching member slidably sleeved about said anvil.

13. In a fastener setting machine, a punch having a cutting edge and a fastener clenching surface external to said edge, an anvil movable relative to said punch to be moved from and against said cutting edge to punch material placed therebetween, and a clenchmg member coiiperating with said clenching surface and slidable on said anvil.

In testimony whereof I have set my hand in presence oftwo subscribin witnesses.

FRANK L. ARMON.

Witnesses:

SARAH WHITE L. STANFORD WILSON. 

